Unlike regular smartphones you don’t see many physical buttons on the iPhone. Here is what you can do with the few buttons available.
Look at the picture to know what the buttons are called.
1.Press home button once from any screen to get back to the home screen.
2.Press home button once from home screen to get the spotlight search (after OS 3.0)
3.Configure the home button double-click (Settings –> General –> Home)
1. Press volume button once or sleep button once to silence the ringer when you get a call.
2. Press sleep button twice to send the call to voicemail without lifting it.
Press the home button and sleep button at once to get a screenshot of the iphone screen.